Installshield Product Code Fixed 🎉 📌

When in doubt, let InstallShield guide you: If you check "Major Upgrade" in the Release Wizard, it will automatically generate a new Product Code for you.

Build a release and test on a clean VM. Check for two entries in Control Panel. Verify that the old registry keys are removed. installshield product code

In legacy InstallScript projects (non-MSI), the Product Code serves a similar function but is managed differently via the Windows registry under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall . It still uniquely identifies the application, but you lose some MSI-specific upgrade features. When in doubt, let InstallShield guide you: If

This is where things get technical. In InstallShield, if you are performing a Major Upgrade , you must change the Product Code but keep the Upgrade Code When in doubt